Deputies have arrested a man accused of fatally stabbing his own mother late Tuesday afternoon.

King County Sheriff's spokesperson Sgt. Cindi West said the stabbing occurred at the woman's home in the 1300 block of Southwest 100th Street at approximately 5:50 p.m.

The accused son called 911 himself, and medics arrived to find the 69-year-old woman had been stabbed multiple times in the neck. Medics performed CPR on the woman, but she could not be revived. The woman has not been identified.

The 42-year-old son has been arrested.

"He's cooperative, I can tell you that," said West. "He said multiple times that he was sorry, and he was begging for us to save her."

The circumstances surrounding the stabbing were not immediately clear, and the investigation is ongoing.